I think you are right. Planning for starting on 6.5u tonight.
Do cats normally use more Levemir than lantus to achieve same effects? So far it seems Fa does not come down too much each time, but the amps and pmps are nicer than before on Lantus.
There is no "normally" comparing cats on Lantus vs. Levemir. Most need about the same, some a little higher, some a bit lower. I have seen a couple cats with insulin auto antibodies turn it around and see significantly less Levemir. And some not. Since the nadirs are later in the Levemir cycle, the preshots will be lower. The nice thing about flatter cycles, if that is what you see with Levemir, the cycles become more predictable.