I remember first reading about Roscoe basses on here and the "P bass on steroids" seemed to come up a lot back then. Reading that actually kept me from buying a Roscoe for awhile as I'm just not a P bass kind of guy. I love the idea of a P bass, dig the tone on a lot of recordings, but they're just not my thing.
After getting the first Roscoe, I could understand the comment more, but the typical Roscoe sound was nothing like a P bass to my ears. Sure, just like a lot of two-pickup basses, you can solo the neck pickup and get into a P bass like territory, but the Roscoe had a sound all its own.
Since the Sadowsky Modern was mentioned and I've had both, I thought I'd weigh in on that, too. Generally speaking, loaded with Roscoe Barts and Bart Pre, a Roscoe sounds nothing like the Sadowsky Modern to me. Sure, similar pickup placement closer to the bridge, but the electronics definitely place them in very different worlds with the Roscoe having an expected darker, more compressed tone and the Sadowsky Modern having a more open, brighter tone. In those two instances, I preferred the tone of the Sadowsky and that's probably why I really liked the Roscoe that I put Big Singles in with the Aguilar OBP-3 (though that still had the Roscoe flavoring and sounded different from the Sadowsky). Considering feel, playability, and looks, I think the Roscoe wins that race every time.
Like others, I like having my Lakland DJ5 should I need something that looks traditional. Certainly nothing wrong with a Fender either - I sold a Fender P5 earlier this year that I had converted to a PJ. It was a fantastic bass, but the Lakland was fantastic-er to me.
Fortunately, I haven't ran into too many picky engineers and artists, and I've been pretty free to play what I want. With that, my new and current Century 5JJ checks a lot of boxes in the whole mixup being a passive jazz bass at heart. I can solo that neck pickup for something rounder like a P bass, run both straight up the middle for a great, slightly scooped jazz bass tone, keep panning toward the bridge pickup to add some bite, or go full on bridge pickup for all out burp. Add in the Aguilar OBP-1 and passive tone control and just wow, the 5JJ is a monster when it comes to versatility and tone. It definitely does NOT sound like the typical Roscoe with Barts, which no doubt is what the majority in this thread are accustomed to and prefer. I certainly wouldn't mind adding a soapbar loaded, typical pickup location Roscoe back into the stable at some point in the future.