Just got my new replacement EP500 amp. The new amp has cooling vents on the back. Like this

My old V2 amp does not, is this the only difference? I'm assuming this is the newer V3 amp?

Dana

M80's, QS8's, M22's, CHT SHO-10, Dual CHT SS-18.1's, Onkyo NR3008, Mitsubishi WD-73740