Pros and Cons of Different Fulltone OCD's

Look up Gearmanndude on youtube he has a OCD shootout with 3 different verisons, to me they all sound within a video close to being equal.  http://www.youtube.com/watch?v=8xht70sagx8

If it's an OCD, you do. I run two of them and they're fantastic. Great tone and dynamically responsive too.

Dammit, now I am thinking about it hard!

http://www.fulltone.com/stpframe.asp

I would do some research on their site and or call Fulltone.  I own both pedals, Fulldrive is a nice Tubescreamer pedal, that has been discussed here a zillion time----if what you need is to simply boost your already cranked amp that has natural OD going on for a solo, etc it's your choice.  If you want to play at bedroom levels, but want to simulate your clean tube amp to sound like it's cranked...this pedal is great.

If you want more gain options than above, I would lean towards OCD, but OCD get be set mild, case in point: When I first heard OCD pedal live, was in Austin and this SRV cover band guitar player simply used a Strat, Fender Super Reverb and OCD and he nailed SRV...helped he was great player...., impressed me enough that I bought one when I got home.

I confuse you ...lol.

Mosfet has a boost switch is nice, but pedal is on larger side.  OCD has more gain to get you more Heavy Blues to Hard Rock tones and comes in a tiny stomp box.

Buying both would be a great choice.  I would put OCD first and FD II after...makes for an inexpensive great stacked OD set-up.

I have the OCD version 4. The other guy in my band has the OCD version 3.
The taper of the controls is different. The version 3 seems to bring on the gain quicker on the dials.
We experimented by turning everything up to ten and putting them side by side in the chain through the same amp and guitar.
There is very little difference, they both have as much volume and gain.
The audience wouldn't notice, I couldn't say one is better than the other.
Essentially they can do the same tones but to get them you may have to put the dials in slightly different places on each pedal.

If it's cheap, buy it. You won't lose money moving it on e-bay if you don't like it

Have you tried the Xotic EP boost? Expensive but good. It took me 5 seconds to decide I was going to buy one after I tried one. There is a decent amount of boost on the OCD.

Presuming your amp is single channel, it can be tough to balance boost levels across clean and dirty tones, with the click of a single footswitch.

The Phil Hilbourne Thunder Tomate is something I haven't tried, but I hear a lot of good things about.

Yeah I owned the Fat Boost for about a week and had to let it go because it just was not cutting it for me.  I just picked up a HBE Germania for super cheap and will get it monday.  I used to love my Beano Boost, but had to sell a bunch of gear to raise funds for a vehicle and that went...  not wanting to spend a ton, and liking the demos I hear, I think the Germania having the treble boost I like plus some EQ will do the trick.  I own a few other treble boosters and I always liked that tone.