Will the EM riva atomizer fit any 510 battery or is it different. Reason i ask is because the EM riva atomizers are 4.50/pc whereas the joye510 atomizers are 5.90/pc. Is the atomizers under the joye510 products a better atomizer perhaps, like a brand name higher end type? Or maybe just not updated completely yet with the new (and very nice btw) website?