Compared to Cat8, Cat7 is better for gaming. In fact, for the average gamer, Cat6a may be a better choice than both Cat7 and Cat8. The two primary reasons for that are cost and requirements. More specifically, most gamers do not yet need the kind of horsepower that Cat7 and Cat8 cables offer. To some, Cat7 is considered over the top while Cat8 is even more of an overkill.
Readers should also understand that the longer the ethernet cable gets, the more the chance of interference, signal loss, physical damage, and management issues.
In terms of performance, Cat7 cables are closer to Cat6a cables than Cat8 cables. Then there is the problem of older computer systems and consoles not having support for Cat8 cables. In such cases, Cat7 is better than Cat8.
In terms of raw power though, Cat7 and Cat8 are pretty much neck and neck. But gamers usually give the budget a good weightage as well when making ethernet cable decisions. Since Cat8 cables are newer with better materials, they are more expensive.
Cat7 ethernet cables have a maximum recommended length of 100 meters. The maximum data transmission speed supported by Cat7 cables is 10 Gbps. Cat8 cables offer 40 Gbps data transmission speeds close to 30 meters only. In terms of shielding, cat8 and cat7 are suited to gamers as well as office employees.
Cat7 cables are also more widely available than Cat8 cables.