Although I have two Ricks - three if you count the 330 guitar - and like them an awful lot, I have to say that, sight unseen? Get the Jazz Bass. Why?
1. If ever the phrase "try before you buy" applied to any bass, it's a Rick. Not only do they just not fit a lot of people at all, Ricks - because of how they're made - are all slightly different. You need to play several of them - on a strap - for several minutes to find one that you like. Assuming a Rick feels like something you want, in the first place. The Jazz Bass? If you like your P-Bass, then a Jazz will almost certainly feel good, too.
2. Ricks can be every bit the pain in the butt that people will tell you they are. Both of mine are perfectly fine - now; but it took quite a while to set them up the way I like them. The one saving grace with Ricks is that once you do get them that way, most of them very seldom require you to fuss with them again. Most of them... The Jazz Bass? If you can set your P-Bass up, it's no different. It won't irritate you setting it up like the Rick probably will, either...
3. Ricks can be as versatile as lots of other basses, but... sometimes that can take a lot of work on your part. No, they aren't a One Trick Pony, but they aren't exactly a Herd O' Tricks, either.. From what you say you're playing, IMO the Jazz Bass will be a better fit... A Rick might do OK, but you might have to work at it...
But, if you do feel comfortable with a Rick; are willing to deal with its...foibles; and think you can get the tones you want out of it? Then, by all means... go for it. Try one, at least. I think everybody should do that; at least, then you'll know for sure...
1. If ever the phrase "try before you buy" applied to any bass, it's a Rick. Not only do they just not fit a lot of people at all, Ricks - because of how they're made - are all slightly different. You need to play several of them - on a strap - for several minutes to find one that you like. Assuming a Rick feels like something you want, in the first place. The Jazz Bass? If you like your P-Bass, then a Jazz will almost certainly feel good, too.
2. Ricks can be every bit the pain in the butt that people will tell you they are. Both of mine are perfectly fine - now; but it took quite a while to set them up the way I like them. The one saving grace with Ricks is that once you do get them that way, most of them very seldom require you to fuss with them again. Most of them... The Jazz Bass? If you can set your P-Bass up, it's no different. It won't irritate you setting it up like the Rick probably will, either...
3. Ricks can be as versatile as lots of other basses, but... sometimes that can take a lot of work on your part. No, they aren't a One Trick Pony, but they aren't exactly a Herd O' Tricks, either.. From what you say you're playing, IMO the Jazz Bass will be a better fit... A Rick might do OK, but you might have to work at it...
But, if you do feel comfortable with a Rick; are willing to deal with its...foibles; and think you can get the tones you want out of it? Then, by all means... go for it. Try one, at least. I think everybody should do that; at least, then you'll know for sure...