There is nothing 'bad' about the TRUSS over the TP biopsy, only how accurate and useful it is. As mentioned, it's discomfort varies from one man to another.
TRUSS is the default biopsy for most NHS health trusts, but TP's are available in some. You have the right to choose what treatment you want, and where you wish to receive it so if you wish to journey further afield then you do not have to accept the first thing on offer.
The bottom line is not to have one of either type before you have your MRI results. At least armed with the knowledge of where to look the TRUSS might bring out what you need to know. The TP however offers much more accuracy and surety in its results.
Again, do some reading and try a chat with the nurses on 0800 074 8383 for professional guidance.
This Google search might help too:
Can I decide what treatment I want?