wrote:
Hi,

i'm interested in the multiengine rating (land), VFR-add-on to my
PP-ASEL.
Any comments about the best training aircraft for these purpose ?
(PA34 Seneca, Beech Duchess, PA44 Seminole, Diamond DA42, ..)

There are big differences concerning the rating requirements.
Some flight schools offer a multi training of 6 hours, other 25 hours
for the rating.

Why it is so ?

Are you just going for the rating or do you want to rent/buy a twin.
The insurance time in type required to rent/buy is usually more than
the time it requires to get the rating. If you have the option to
rent/buy one just make sure you get your rating in the same model. For
all practical purposes twins are as if they have a type rating (from
the insurance check out requirements).

-Robert