I have actually tried both and I thought that Mojo was decent but the Erexite really gave me a stiffy that wouldn't quit! Also it seemed to stay in my system the next day as I woke up Rock Solid and pumped out another session in the morning!
Haven't tried anything like this since the original aspire 36 which worked great but made me feel like crap. Stuffy nose, constant headache not relieved by pain killers that lasts 24 hours. Nauseated too.