While I have specific experience with neither, Ill comment that the 6" between those two lengths make a big difference in how a rod performs. At 6'6", I feel that an angler is more or less relegated to the smallest of streams. A 7' rod is the shortest thing I would consider to be "versatile". Most would not consider a 7' rod to be versatile, but I live in a choked down area with lots of overhead cover.

I've got the whole 2 piece Lami series: 6.5', 7', 7.5', and 8'. The rod speed increases with length with the 6.5' being slow and the 8' being medium.

The 6.5' and 7' are very different. The 6.5' is a blast on small brook trout streams throwing small dries, but that is about all it can handle. The 7' can handle some wind, small nymph rigs, even a small bugger. It is a real sweet dry fly rod first and foremost. One of the best fiberglass 3 weights in my opinion.

Good choice, if you are only building one of them, the 7 footer will see much more use.

I have the 6ft six inch version,and I agree it is only good for small streams.I even tried it on a pond and it was too small,although I got a nice sunfish on it.