Unless people with certain body types/genes are more suited to different zoanoid models.
While it is true that some zoaforms have traits that bleed into their human forms, we have mainly just seen this in Hypers, Lords, and Lost numbers. One trait that we can confirm is their resilience to sickness. After X-day, Chronos advertised that getting zoaformed makes you stronger, and I believe if memory serves more resilient to sickness. Though does the strength come in the zoaform? Are you brainwashed into exercising? And is the resilience simply because of different protein coatings on the modified cells of the human/zoanoid no longer being compatible with modern germs? Tough to say, Guyver is not a tech manual
The 2005 series is not the manga, and there were a few animation mistakes, but it did make the point that the whole body might not necessarily zoaform at the same time. Murakami for instance could morph only his hand to fire the big gun. Synevite morphed his legs to stand in the water. If zoanoids are only doing partial morphs to tap into abilities from time to time, it would make it even harder to answer this question. The anime isn't necessarily canon, but it's pretty close. I'd hold it for consideration. Some scenes in the anime were better fleshed out and expanded upon-despite not perfect animation.