Letranger,
Middle fossa is associated with the greater risk of cognitive difficulties than translab because in MF approach the surgeon has to retract temporal lobe - it plays a role in mood, memory and language. In translab, the surgeon has to retract cerebellum which plays a far lesser role in cognitive functioning, therefore, translab is not associated with cognitive difficulties when the tumor is small and does not press on the brain yet (which is your situation).
In terms of headaches, middle fossa has an increased risk of headaches because of the muscle being cut (lateral pterygoid, as one surgeon explained to me). These headaches, if they occur, are intractable and hard to treat. Translab is not associated with these kinds of headaches because there are no major muscles to cut.
Middle fossa also has far worse facial nerve preservation rate than translab becasue they go from the top and the facial nerve is sometimes not identified. in translab, the facial nerve is identified and protected although the preservation rate decreases when the tumor size increases ( yours is small, remember).
Middle fossa has the highest rate of hearing preservation and may be that is why it is recommended for you. Translab is guaranteed deafness in the affected ear because they take the inner ear out. I do not know what is the chance of the hearing preservation with MF approach but I guess it really depends on the surgeon. Single sided deafness is not great but is not awful to live with either as many of us can attest. In addition, in the past few years, there are choices in the hearing aids for unilateral deafness - BAHA, Transear, Starkey and I also heard somebody using Siemens. Technology is forever improving, I can't wait to see what is going to be out there in 10 years. I have to add, though, that at this point, nothing is better that your own fully functioning two ears even if it is a lot of help.
The bottom line is, the choice of the approach depends on your goals and which risks you are willing to take. Some people sail through middle fossa with their hearing preserved, some people have their lives ruined by headaches and cognitive difficulties as the result of the surgery and lost their hearing as well. There is just no way to tell upfront where you are going to be. Take care and best wishes,
Eve