That is basically what the choice comes down to.
Both great boards, with a number of similarities as far as modes and features are concerned but with some differences as well. So the choice comes down to which of the differing features is most important to you.
Both boards have lifetime warranties, but I would have to say that Virtue are more liberal in applying the warranty. The Virtue board also has the training drills, if those interest you. The Virtue board has adjustable eye fault rate of fire, but not adjustable eye off rate of fire. You have a built in speaker. The board can be updated, and new boot screens installed, but this requires a separate programming kit rather than just a USB cable. Select fire mode allows you to adjust through all the marker's modes. The board uses easily replaceable, plug in battery harnesses.
Only having a microswitch is a downside compared to the USB Yakuza board (the original Yakuza board also only had a microswitch, and didn't have the USB port). Moreover, the mocroswitch is aligned with the trigger spur, not the firing point adjustment screw, so you loose a trigger adjustment. This does however allow the same board to be used in the '06 Ego as would be used in the Ego7, Ego8 and Geo.
The advantages of the USB Yakuza are obviously that it can be updated with a common Mini USB B cable, something which I already had several of from other electronic parts, so I didn't need to buy a cable for the board. You have the optical switch, and the microswitch uses the triggers adjuster screw. You have a dedicated socket for RF connection. You have fixed battery clips on the board rather than a battery harness, which some people prefer. The select fire version allows you to choose three different modes to switch between.