I played the Seasons in 2000 with the Wetherby Silver Band when it was the test piece for the National Finals at the RAH. There isn't that much to say about it really, apart from that its a cracking little fourth section test piece. Theres a lot to go at in it, and requires a lot of the basic things to be played correctly for it to sound good. The first movement, although quite modern in style is gorgeous, and when played well, definitely makes the hairs stand up on the back of your neck. Horn players beware the second movement, a bit of a cheesy waltz but with fairly interesting band parts. The March is superb, but a hell of a blow after playing a test piece that is quite demanding on the chops.
I think you will find in time that you'll enjoy the Seasons a lot more than Lydian Pictures, but that's only opinion. There is so much to go at Wilbys piece, but having played both, I think you'll find many similarities bewtween the two.
Craig