The Ultimate was not brought into North America last year. Any that were available were from 2016. The Evo was available. Not sure if the Ultimate will be available this year, maybe talk to Kennedy Motorsports to see if they can get the Ultimate this year.
The Pirelli is still old school tire. It has steel in it. The Michelin and Dunlop are more newer constructions. I would say they are most similar. But A Dunlop is not a Michelin and vice versa. They will each work great with due diligence or not so good if you do no diligence. With these tires your grip and longevity is with tire hot pressures. So regardless of which,, you need to do some homework. Kennedy Motorsports is more then able to help you out.
The Pirelli is still old school tire. It has steel in it. The Michelin and Dunlop are more newer constructions. I would say they are most similar. But A Dunlop is not a Michelin and vice versa. They will each work great with due diligence or not so good if you do no diligence. With these tires your grip and longevity is with tire hot pressures. So regardless of which,, you need to do some homework. Kennedy Motorsports is more then able to help you out.