I don't have any experience, but MTBYUMYUM was really impressed with the Revel. I think he does some comparison with the SC either in this video or in the chat video.

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Anyone?? Anyone?? MTB Yum Yum said Rascal..

 

My buddy sold his Ripmo and got a Rascal; he has zero regrets. His Strava times confirm this.

 

I've ridden both the Tallboy and the Rascal. Both are more oriented toward descending. Climbing ability on both is decent though not as efficient as say a Pivot Trail 429 and just slightly less efficient than a Yeti SB130. The suspension feels different on the two bikes. The rear suspension movement is perhaps slightly better controlled on the Tallboy, but the Rascal seems to have better separation between suspension movement and pedaling forces.

In terms of descending ability, I would pick the Revel over the Tallboy. The Tallboy needed some speed to feel responsive. In comparison, the Rascal seemed more nimble at lower speeds, but just as capable as the Tallboy at higher speeds. I think the Rascal's carbon layup is particularly well tuned as the bike had an exceptionally solid cornering feel. The Tallboy wasn't flexy by any means, but the Rascal feels particularly solid.

 

Perfect Spectre!! just what I was looking for!

 

While I do not have any time on the TB4, I did demo the other 2 in Spectre’s post, prior to landing on the Rascal. He summed it up well.

It is a good climber, but definitely not the best. Descending, it has the fun factor of a smaller wheeled bike. If you like to ‘ride’ the trail, not just plow thru, you’ll really appreciate the Rascal.

 

I have been on both bikes as well and agree with what Spectre said. Revel chose to use a 51mm offset fork with the Rascal because they feel it keeps the bike more responsive and playful rather than going with a 40 something offset. I totally agree because the bike is quick responsive and fun to ride. Suspension in climbing is a little better than the Tallboy but both bikes climb really well. I didn't say they climb the best, but they climb well.

For the Tallby being 120mm, it feels like it has 130mm. It's super plush feeling and supportive in the mistroke that it feels like a 130mm bike, its really desceptive in that area. The Tallboy also has flip chip adjustability in the chainstay and lower shock mount to slacken HTA or to steepen it, the Rascal does not have that. Rascal has better paint jobs in person, they look really cool, Tallboy is Yellow and dark purple.

The Tallboy frame is very heavy for 120mm category bike, but it makes for a super stiff frame. The Tallboy likes to be pushed hard and will respond but its a fun bike too. You can't go wrong with either of them. I found these two videos to be interesting in addition to MTB yum yum:

 

I currently have a Primer which I've been extremely pleased with but it's 3+ years old and I'm looking to do a frame swap. I've ridden the Tallboy, Ripley V4 and just demo'd the Rascal the other day. The Ripley is hands down the best climber and can be built in the 27 lb range w/o too much difficulty based on the demo I rode. It's plenty capable going down as well. The Revel Rascal doesn't climb as well but my oh my does it descend FAR better than the others in my opinion. I've always been a Yeti switch infinity fan but I think this bike goes down chunkier, brake rutted trail much better & smoother than the SB 130 & SB140 bikes I demoed....all ridden on the same 14 mile loop.

I can sum it up this way....I think that the Revel's rear suspension is the best design I've ever ridden for going downhill (my friend has the Rail so I rode that too. Plusher than the Rascal but the 29er seems to smooth out the chatter & break bumps better). Also, if you told me I could only have ONE bike today, I'd take the Rascal and ride it anywhere other than a full on bike park.