Low T, Undescended Testicle Problem

Hello forum members
I am 38 years old and have low testosterone due to undescended testicle problem
I’m in the area of total testosterone 2.7
I use gel for month and a half and have some improvement in symptoms
Although serum testosterone did not grow

What is leveled is the FSH thet was high and now its normal
Should I switch to nebido or Tstoviron depo 250
Or continue with the gel and wait for further improvement
Consultation with the doctor he claims thet the Tstoviron depo 250 is more Effective then the nebido

Thank you