Forest winning the league first season up? Then going on to win the european cup 2 years in a row?
In the context of how much football has changed since then, I think this would be greater.
I do get your point and hell what Leicester are doing defies all logic but the forest thing was in the era of Liverpool at their best and Forest had finished 3rd in the 2nd division before coming up
It's personal opinions, but was I see it Leciester are doing this in an era with 4 or 5 "Liverpools", all boosted by either years of CL revenue or oil-rich billionaires pouring huge amounts of money in giving them access to top players around the world on a scale never seen before in this country. Putting together a title challenging side at a tiny nothing club in the current era has to be a much greater achievement.
And not wanting to belittle their achievement, the European Cup was a flat knockout competition back then.