It appears to me the difference in money between the two deals isn't a factor for you, so I'd strongly recommend the Exec over the standard.
ABS is something I first experienced on my first BMW, and all I can say is that having that feature onboard is the main reason I am here now, writing this to you.
You will see some naysayers here and on other forums when it comes to ABS, and certainly, they are entitled to their opinions, as we are
The old adage about ABS goes on, and I'll say it one more time too.
"All you have to do is use it once, just once, to get yourself out of a tight spot and it will pay for itself right there".
Let us know what you wind up doing!
PS- the other features of the Exec over the standard, the electrically retractable mirrors, the electric windscreen and the passenger backrest, along with the chromed muffler cover are also worth the extra $$$, including the ABS. Plus, the mirrors themselves are some of the best on any bike I have ever owned. Once you get them set, they'll stay that way..forever. Good luck to you....Either way, you are getting, in the 650, the finest step through motorcycle on the planet...the Exec just has some nicer features than the standard, IMHO.
PPS: One more thing...I have never seen an Exec owner second guessing themselves and wishing they had bought the standard instead.