I've always love both Alton and Blackpool, but for different reasons.
Blackpool for me is about the lights (illumination season), the pleasure beach and the midway attractions at the tower and around.
The pleasure beach had some of the best old fashion and novelty rides, many of which have sadly been removed over the past 30 years. I go mainly for the woodies, dark rides and the Valhalla
Alton on the other hand have the best steel coasters and I love the setting in the natural beauty of the grounds.
It's very hard to compare the two, one is a theme park and the other is a pleasure beach. Both parks are great for different reasons. I visit Alton (pre-pandemic) monthly during the open season, where as I visited Blackpool every other year, which gives you the idea which one of the two that I prefer.
I try not to spend my time or energy on comparing what is the best ride/themepark. Each park will have it good and bad points. I rather just go somewhere and make the most of my time there. Just enjoy the moment of your visit, hence why you won't see me with my head tucked into my phone.
You won't see me getting involved much on here or any where else with regards to what is the best ride/themepark (or any other them park rivalry). I enjoy going to a park that have rides regardless.
The pandemic has change our experience of a day out. Things will feel different for many months to come, maybe for good