Actually the 430 is in the intermediate category, the EC 155 is in the medium category so is a bit difficult to compare them but I looked up the numbers for fun.
EC 155 IGE Hover ceiling is 6210 ft.
OGE Hover ceiling is 2800 ft.
Bell 430 IGE Hover ceiling is 11700 ft.
OGE Hover ceiling is 6200 ft.
All the above at max. gross of course.