Well, I won't claim to be an expert because I have NO experience with hotbodies or the LSP, but I just got the Jammin and LOVE it. I think OFNA has a better reputation as a company (though hotbodies is now ownerd by HPI, so maybe that will help)
There is always talk of parts availability for HB products, and I have never had problems with my ofna 9.5 buggy (haven't had the CRT long enough to need any new parts yet...we'll see)
The fit and finish of the CRT is flawless, the chassis is very rigid and I don't see any weak points. I remember seeing an early LSP in my LHS, and the chassis had some bad flex in it.... maybe this has been solved?
The other consideration is RTR or kit? I don't know that the jammin RTR is released yet, whereas the HB is.
Good luck, and enjoy!