Depends on what you personally consider "cheaper". For me, much of the updated Tatooine shots now look much more magical and feel like it is actually "a galaxy far far away" than it did in original shots. One notable example is the new Ben's hut (probably one of my favourite changes in ANH).
And here is one of the original shots. Mind that it is not the speeder and its shadow (ie special effects), but the surrounding itself that makes it look bad to me.
