Most people will tell you that the LRP is faster. It is a little lighter and you can tune a little with the punch settings but that's about it.
I'm still running my original two 4 cell GTB's but I have 4 LRP's to send in. For some, the Novak's are more reliable, and for others, it's the LRP.
You won't find much support from LRP on here (except the AE guys) but you will find plenty of support threads to ask questions about Novak, Speedpassion and Tekin stuff. Emailing Novak and Tekin directly usally works out pretty well also.