Whether fleece is better than disposable bedding - it depends on your perspective and personal preference! You can only try and see which one you prefer!
My piggies live in my shed and due to that I use a disposable bedding but occasionally use fleece in summer in their shed but mostly when they have to come indoors in summer due to the heat outside.
Do I personally think fleece is better? No, I cant bear the additional washing!
But there are many who dont have the means to dispose of large amounts of disposable bedding so fleece is better for them.
It also depends on the sex of your piggies (boys can be messier and smellier then girls), size of cage, how good the absorbent layer under the fleece and the type of disposable bedding you use. I find some disposables are worse than others.
I don’t have experience of paper bedding and instead I use a shavings type of bedding (it’s more wood chips than shavings).
I spot clean my four piggies (I have four boys - a pair and two singles) twice a day and that is all that is needed, along with a full clean once a week.
With fleece, you will still need to spot clean it a few times a day and on top of that it can need to have a full change every 3-5 days (again, depends on certain factors).
The guides below will help you
A Detailed Guide For Fleece Bedding
Bedding For Guinea Pigs - Overview