Loveland and Arapahoe Basin are both areas that are mostly at or above tree line. Arapahoe Basin overall has the Steeper terrain. Snowfall wise they are pretty equal. Loveland is a larger ski area, though Slapahoe has closed that gap a bit because of the addition of Montezuma bowl. Both are fun.
The real big difference is that Arapahoe Basin is on the Epic/Colorado Pass which about 70% of the season pass holders in the front range (everyone that rides/skis pretty much has a season pass) have their passes too. Loveland only sells season passes to it's resort. So the numbers are much less. Weekend crowds are like weekday crowds at A-Basin. So if you are coming out to Colorado for a few days, Loveland is going to be the much less crowded resort. It also has a lot of the type of terrain you are looking for.