I've played Leon's EVO and I own a Blackjack so I guess my opinion is worth something.
To me the Blackjack feels more like a PRS and the EVO feels more like a Gibson. The EVO has a bit thicker neck and it feels more rounded if I remember correctly. Ifthe neck on the Blackjack doesn't phase you the EVO shouldn't either. The Leon's EVO is a heavier than my Blackjack and it sounds a bit denser to. The EVO just seems a bit meatier than the Blackjack. The EVO is a great guitar epecially considering how cheap you can usually score them for.