Let’s start with the style. There are a few less obvious points to consider.
If you have a small belly, a classic Barong Tagalog can make it look more noticeable. A classic Barong is also pulled on over the head, which makes it more difficult to put on and take off.
A Coat Barong is more versatile in this respect. It fastens fully at the front, is easier to put on, and creates a more defined silhouette.
If the wedding takes place on a beach, outdoors, or does not have a strict dress code, a Modern Barong may be a more comfortable option.