Changing board dimensions?

I currently own an used Flyer 6'6" (20 3/4 x 2 3/8) and a Dragonfly 7'6", honestly, I have stopped using my 7'6" completely, I just want to ride my 6'6" now. I was thinking on selling both of these and getting a Flyer II 6'6" (19 x 2 1/2), but I was concerned by the dimensions. Do you think they would make a huge difference? Do you think it would make it harder or what would it affect? I mean, I can stand up on my 6'6" and ride it, not an expert but I can stand up on it and ride it.
Any comments?
Any comments?