Thats a hard question to answer. Everyone handles & Shoots Weapons Differently.
As to choosing a particular Weapon both have Pros & Cons. Semi- Autos have more rounds availible, They are easier to reload, But have the potential of more Mechanical Mis-Functions.
Revovlers have less Ammo Capacity, Are harder to reload, But are less likely to have Mechanical Mis-Functions, And in the right hands are more Accurate, In My opionion !
Both are excellent Weapons, Both will Protect your Life. In the end it's not the choice of Semi, or Revolver. It's how well you handle each of those Weapons to best suit your Needs.
So as I said, It's an hard question to give you the answer your looking for. My suggestion to you is, Shoot, and practise with both. Find your groove. You, and only You will know which Weapon best fits your needs. Good Luck, and welcome to USACarry! Glad you have Joined us. There are allot of Good Poeple here, that have allot of Excellent advise.
Just think about it, Where else could you go to have this type of Experience, and Knowledge at your Finger Tips...