Hi Steve
I believe you mentioned some off road use as a possibility for your new Club tour. On that basis alone I would use the Son 28 because:
1, it has a steel axle (delux is alloy)
2, it has wider flange spacing than the delux so building into a stronger wheel
3, it has slightly better low (very low) speed output for nightime off road and grovelling home at the end of a long day
4, it's not much heavier either and is a noticable improvement on the old 28 klassik to boot.
But then Andre will be along shortly to tell you to stop being a fool and buy a Shimano instead
If you want to be really posh Jan Heine has had Schmidt produce a 28/Delux hybrid for the absolute best of both http://www.compasscycle.com/lighting_delux_widebody.html
Happy shopping
Ian