I need help buying ski boots for alpine skiing

I used to ski actively on skiing resorts in Europe from age 3 to 15. I am now 30 and want to ski again. Last year I rented the ski boots and tried skiing again for 1 day. Despite my suspition I did not forget how to ski. 😅 This year I booked a 7 day skiing trip and want to buy ski boots as I plan to ski actively again.

The issue is that I need 28 size low volume boots and am struggling to find womens ski boots in that size which are low volume. I went to get my feet measured and the width of my feet is 98mm. So here are my questions:

* Is there a difference between mens and womens ski boots?

* Are there any brand/model which you would suggest for me?

* Do I absulutely need to try them on or is the option of ordering online okay?

I have Salomon Aero Ti alpine skis.