T-Cyp is bio-identical. The T is bound to an oil ester. Once seperated in the body, the Testosterone is identical to what your body produces.
The bio-identical craze is really related to female hormone replacement as there are synthetic non-bio-identical hormones woman have been prescribed (and continue to be prescribed) that do a great deal of harm to the body. I am not aware of any synthetic testosterone replacement options, anyone else know of any?
If the pharmacist compounds you a cream, he or she will be using the same basic 'stuff' that comes in T-Cyp shots less the ester plus extra things needed for transdermal application.
Creams are good (IF you can absorb them) but you should be aware of the alternatives and costs.