Matt would not be eligible for E+ on UA and I doubt they have it yet on EWR-OSL since it's an old CO route.
On the other hand he can upgrade to Y or C on SAS for a reasonable price using Optiontown. (See threads here).
However, I noticed that UA now also gives 100% miles and PQM for SAS discount economy as of May 1. Why anybody who sometimes flies on discounted tickets would continue with Eurobonus is a mystery to me. I suppose the new rule that you need to fly 4 segments on UA per year is a hindrance.
https://www.united.com/CMS/en-US/mar...spx?ItemId=317