Id suggest you consider the total amount of aspects that differ. An ABSN program is great as an idea, however we are talking about 3 years of nursing in 1 year, high stress, somewhat high dropout rates (depending the school and area). Since its an ABSN its safe to guess you have a B.S., so an alternative is try to take BSN courses while taking your ADN, thats what i'm doing and ill graduate in a year with both a BSN and an ADN. That only works if your program has a BSN with their ADN. Some states post their NCLEX pass rates and such for each college including number of students taking (Pennsylvania does) and the NCLEX is great for some schools
, especially when a school has a 90% and you find out they have 10 students that took the test and realize that the scores and statistics mean little to each person.
As far as staying in the ADN program, I'm in one and i had the option of an ABSN. Theres more stress and burning out in one, your pretty much a quarter the way through your ADN, and when you complete it you can take your BSN online, many hospitals give you time before your required to have it.
I'd suggest you consider all the factors and decide, the time it takes to complete it is about 6 month difference between ADN and ABSN, so its your personal choice.
and the class of fundamentals probably wont transfer, generally ADN courses don't transfer to ABSN courses. It may vary for the college, but the ones ive seen don't usually transfer.