The 7.5 although it looks similar to the 26 is a very different boat. It is 2 feet shorter than the 26 and very much lighter.
The 26 is a reasonably solid boat that I believe was originally built to make sailing more affordable in this size range. With a 150% genoa it is OK in lighter winds which is what I believe LI Sound has but is certainly not a rocket. Although from what you have been sailing this will probably perform very well for you.
Not a bad boat but definitely a starter boat. You will enjoy it and it is certainly affordable.
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