Question about different Solar filter styles.

I have noticed that there are 2 diferent styles of solar filters, what are the differences in optical clearity. There is the type that covers the entire end of your scope with filter material. Then there is one that covers the end of the scope with cap that has a small circle of filter material. Which one would best suit photography?

Kirk

The main difference between full-aperture and off-axis solar filters is initial cost. Ron