If your wanting your main focus to be scenario games (woodsball) you ideally want a gun that can be carried like a rifle, size doesn’t matter too much as long as it’s both durable and comfortable.
With regards to speedball, you want to look for a gun that is compact and hugs closely to your body when needed and shoots rapid.
This reinforces the myth that there is such a thing as a woodsball gun
A so called speedball gun is ergonomically designed for paintball, and is even more advantageous in the woods for the same reasons as in speedball but also that a woodsball player may have less space to move around
A woodsball player can get away with a bigger bulkier heavier gun, but it doesn't make it ideal