Gear: American SSS Strat into Retro Channel RR1 - amp set clean
My comparisons will mostly focus on one vs. the other but I'll do my best to tie in any other common pedal or sound references I can think of. Also, while each can do boost, OD, distortion, and fuzz I'll focus on what I thought they did best...
SYODv1
The BJFe version of this pedal was was my favorite distortion unit for a while. It's brighter, more aggressive and has higher headroom than SYODv2. I spent very little time with it in boost and OD territory but it could certainly have some minor use there for me. Most of my time was spent trying to dial in the distortion tones I missed from the BJFe. I was close but I'm still not hearing the same EQ as I remember but memories change so who knows. I recall the BJFe being more aggressive and "sparkly" / clangy in the upper mids and treble. The Bearfoot seems to be more smoothed out in that register. It's almost like the BJFe had more low mids post distortion (so it doesn't woof out). However I can say the distortion tones still sound nice. They are bright and clear without the super aggressive clang of the MH. There is a good amount of drive on tap but not as much as the MH (from memory) and definitely nowhere near what the CH2 has to offer (IMO of course
).It maintains headroom and clarity in the upper strings even with higher distortion settings although I found the sweet spot hard to nail down as it's over a very small portion of the pot sweep for me. OD & Boost seem to occur from fully CCW to around 12-1 o'clock. Then distortion kicks in around 1-3 but the "sweet spot" for me was right around that 2-3 range. Beyond that it got more saturated and lost some of the headroom and clarity which is the reason I like the pedal. With the mids knob cranked it gets into woofier fuzz territory which I didn't spend much time with. I generally ran the treble around 9-12. Also it seemed to sound best with the mids and treble knobs in similar positions. My favorite thing about this pedal is doing full bar chords (not power chords) and hearing the top notes ring out
Approx favorite setting...
Volume - 10:00
Gain - 2:00-3:00
Mids - 10:30
Treble - 10:00
SYODv2
Very nice smooth overdrive. Didn't spend much time with it as a boost or distortion as, due to the additional compression and smoothness of the breakup, it performed best for me as an overdrive. Great bluesy tones, especially on the neck pickup. Not as aggressive and rough around the edges as the v1 -- definitely a more smooth and refined version of the circuit. It sounds great for those fatter neck PU sounds. As far as comparing it to the BBOD -- I didn't get the raw fuzzy vintage sound out of the SYODv2 that I LOVE in the BBOD. It definitely plays in a similar gain range but the SYOD is more compressed and smoother.
With the mids knob maxed this one gets fuzzy as well. It gets woofier and woolier than v1 but I didn't spend much time checking this setting so don't have much more to add there. In OD land it integrates very well with everything and feels like a part of your amp. Not artificial or added over top of your tone but more integrated with it. Very nice as an OD and it will be a hard choice for me whether to keep both the SYODv2 and BBOD on the same board as they both cover the same gain ranges for me with different amounts/types of compression, smoothness/hairiness, and EQ. Hmm...
Approx favorite setting...
Volume - 10:00
Gain - 1:00
Mids - 11:00
Treble - 10:30
SYODv1 > SYODv2
Due to the complementary nature of the two pedals (they are revisions of the same circuit) they sound great working together. I didn't spend much time with this but just wanted to note that the clarity of the v1 > the smoothness of the v2 can give some great higher gain lead tones.
That's all for now -- need to keep tweaking to get these the way I like them. Curious now whether there has been further revisions to the circuit beyond the BJFe twin research batch... Seems to me I remember each one sounding sounding different in BJFe form although there's that fourth variable parameter now in the pre-distortion mids. I will keep tweaking and trying to find that spot where they sound like the 3 knob pedals did. Hoping it's in there somewhere as they were pretty much perfection for me as they were set before. And the mids knob is a great addition for variety (can make this thing super useful as a boost and a fuzz which the 3 knob pedals didn't cover as well) but it's making it harder for me to dial in the tones I'm after. All that said -- I am treating it as a learning curve and am sure I'll get it sorted soon... just gotta do a little more of this
and a little less of this 
Edit -- wow... I need to learn to simplify and condense my thoughts. I'll save that effort for the next round.
