There's a little more to it than that :-)! I had a CFX when I got my HW 77K. By that time, my CFX was far from stock, GRT III trigger and a Theoben gas ram. With all the work I'd done on it, it ended up costing as much or more than a new HW 77/97, and it was still a Gamo. Power and accuracy are very similar, but that's where the similarity ends. As good as Bob's trigger is, the Rekord is still far superior. With the gas ram in the CFX, it has a shot cycle similar to the 77, but with a spring, it's not even close to the same when it comes to smooth. Fit and finish are really no comparison, and I don't think anyone expects to pass a Gamo on to their children. The CFX is much lighter and longer. Of the two, I'd prefer the CFX for a day trekking in the woods, off the bench, both are excellent. Of the two, I found it easier to "get in the groove" with the CFX, but that seems to be changing. I think I'm finally figuring out how the 77 wants to be shot :-)! They can both be troublesome with scope length, the CFX is okay with a scope around 13 1/2" long, maybe longer with a short eye relief. You absolutely CAN NOT cover the loading port on a CFX. The 77/97 can go longer, I currently have a Simmon 44 Mag on mine at 14 1/2", but it makes loading kind of a PITA. 13" or less is much better. My 77 has a 97 stock, much better for scope use. Of the two, the CFX is definitely less hold sensitive.
Just reread this, obviously much of this is opinion, your mileage may vary, as they say :-). There's a huge disparity in price point between the two, but both are an excellent value. I was lucky, I bought the CFX as my first adult airgun, and I think it's one of the best choices available for a beginner. The 77/97 is a logical choice for someone moving up in quality that started with an underlever. And there I go being long winded again. Later.
Dave