Looks like they're both the same height.
It's hard to tell, but I'm guessing they're the short length?
Here is some information obtained on another forum where dyno testing was done with varying intake length combinations.
"I spent 2 days at the dyno testing all combinations of velocity stacks (2 short, 2 long, 1 short up front, 1 short on the rear) on both SP1 and SP2 throttle bodies.
We found on both SP1 and SP2 is there was no power to be gained by going to 2 short, and no power to be lost by having 2 long. What we did change was the mid range.
In both cases having the long on the front and short rear gave us the best curve (opposite from normal).
A nasty dip would show up in the 6-7K range with two short. We didn’t see much improvement anywhere by having two long but it didn’t hurt the top end.
We (and I have heard from others who tested with the same results) believe the only reason Honda uses a short stack in the front was due to limited space in stock airbox.
Testing was done on a high comp engine with head work, cams and a full exhaust. I have not tested on a stock engine but believe the results would be very similar."