Oh, sorry, I got the wrong end of the stick!
The non-maintained special school my kids are at now is better - light years better. But it's not so much a resources thing as an organisational culture thing, ime. And special schools having greater freedom to forge their own path.
The unit my kids went to did its best. In terms of resources, the unit wasn't a lot worse off than the kids' current special school. The unit did as much as they reasonably could do with inclusion.
But the unit was part of a much bigger primary school, and when the primary school sneezed, the unit caught a cold.
So when Ofsted came to town and told the school how it should improve, the school followed its recommendations to the letter. Didn't matter if those changes were right for my kids or not - for the most part, the changes weren't right for them. But Ofsted had said it, so it had to happen.
The wheels started to fall off the bus with the mainstream SEN funding changes two years ago. The HT was a staunch supporter of the unit - right up to the point where the funding arrangements changed, and left him actually having to dip into his own budget to promote inclusion.
His attitude changed pretty soon after that; TAs were made redundant, specialist teachers weren't replaced, parents of children with SEN were gently told 'it might be best if you tried another school.' You get the picture.
Tbh, I think that every parent would tell you a different story - depends how resource-intensive your DC's needs are, depends whether the mainstream school pays more than lip service to the idea of inclusion. But that's how things worked for us.