So a few years ago I did some work for someone and mentioned I liked the Acer in the garden (in spite of its treatment). The lady said her son had bought it years ago and it was in the wrong place, so she had basically been butchering it into a round shape every couple of years so it was a bit of a mess. Healthy, but not natural. In short she said if I'd like it I could have it if I removed it... Score! As I had planned on using it for bonsai material I did some drastic trunk chops etc. It's far from perfect and needs ground layering but it's a long project. (AlainK I'll be requesting help!) Anyway, it leafs out as in the first picture, similar to Katsura I thought. It is now a very pale yellow with fine orange/red margin. The more shaded leaves inside have mostly gone a lime sort of greeny yellow. It's held the same colour almost exactly as my Jordan. New growth is on red stems as with Jordan. My Summer's Gold has larger leaves, although this bonsai material is definitely root bound as it's been in this box for 3-4 years I think, so this could be restricting leaf size. Other thought was possibly Katsura?