Maybe 24th century (I'm assuming you meant the 2300s, since that's when the Akira was developed) starships just look like 22nd century starships.I like the different design but it does look more like a 23rd century starship.
I agree that the NX looks better than the Akira. I'm not a big fan of inverted warp nacelles (that was my biggest issue with the winning design for the USS Titan, too).