During one of my lessons I asked this very question. My instructor, PGA Teaching Pro, said that it is easier to get the 7w through than the same lofted hybrid.
I didn't believe him but after much time / trial it seems, for me, to be true. Everyone has different bio mechanics.
Look at your gaps and your yardage gaps. Find where those are and fill it with the appropriate club. I would look at the more modern 7w from Callaway (my new love in clubs) - for me it is the speed - Taylormade, Ping, etc. and hit it along side your 26* 7w. I will say that you will be surprised by the distance and forgiveness of the newer clubs.
When I did this very thing I put up the Ping (as I was a ping guy) 425 in both the 7w and the 4hy, the same in Taylormade, Titleist, Callaway (loved the super hybrid, but it was way too high a launcher for me), Cobra and Wilson. Then I did a fitting and it came down to the Titleist and the Callaway because of feel and numbers. The Callaway just felt better.
You need to go and try em all, feel the feel and note the distances and I would suggest that you get a pga pro (fitting/teaching) to fit you for the club you are looking at/for.