That's only if you choose to use subway technology along the DRL, instead of more suitable commuter trains, LRTs or BRT. But let's give your comparison theory a try, shall we:
Eglinton- Pearson, Dixon corporate zone, Skyway Industrial Park, Airport Corporate Centre, Mississauga Transit Terminal, Scarlett Mills condo developments, Weston/Mt Dennis catchment, Eglinton West BIA, two possible GO connections @ Black Creek and Caledonia, two possible YUS connections, Eglinton Way shopping district, Upper Canada College, Yonge-Eglinton area, Sunnybrook/Glendon catchment, Leaside Ctr/industrial park, [with Overlea-Don Mills diversion: Throncliffe Park, Flemingdon Park, Ontario Science Ctr, Don Mills Centre, Wynford-Concorde business area], Eglinton Square/Golden Mile area, mass terminal @Kennedy Stn, Eglinton GO Stn, Markington Sq and proximity to Cedarbrae, option of expanding to Morningside/UTSC.
DRL- Seneca College, transfer @Sheppard, Graydon Hall/Lesmill area, Don Mills Centre, Ont Sci Ctr, Thorncliffe Park, Pape Village/Greektown, transfer @Danforth, Gerrard Sq, East Bayfront/West Don Lands, Distillery District/St Lawrence, Union Stn, Skydome/CN Tower, waterfront condos, Fort York, Exhibition, Queen West condos, Bloor GO, Mt Dennis/Weston, Woodbine Racetrack, Pearson.
As you'll see there's alot of overlap is involved. So really it's just a matter of which is better bang for Torontonians/GTA's buck.
First off, no Eglinton line is going to divert south to Thorncliffe Park, north to Don Mills, and then back to Eglinton again. Those must be the famous 180 degree turns I keep reading about. So right off the bat we can take off all the nodes you have in brackets. Upper Canada College and Glendon college aren't on Eglinton, so including them is iffy at best. If you can include those for Eglinton you have to include places like Roncesvalles and Regent Park in a DRL. Weston is way too far to include. And power centres and industrial parks aren't exactly big trip generators for transit, but I'll give you those, and add them onto a DRL as well.
So let's do this comparison again.
Eglinton: Pearson, Dixon corporate zone, Skyway Industrial Park, Airport Corporate Centre, Mississauga City Centre, Scarlett Mills condo developments, Mt Dennis, Eglinton West BIA, 2 GO connections @ Black Creek and Caledonia, 2 YUS connections @ Allen & Yonge, Eglinton Way, Upper Canada College, Yonge-Eglinton area, Sunnybrook/Glendon, Flemingdon Park, Leaside Ctr/industrial park, Eglinton Square/Golden Mile area, mass terminal @Kennedy Stn, Eglinton GO Stn, Markington Sq and proximity to Cedarbrae, option of expanding to Morningside/UTSC.
DRL: Seneca College, transfer @Sheppard, Fairview Mall, Graydon Hall/Lesmill area, Don Mills Centre, 2 transfers to Eglinton LRT @ Don Mills & Mount Dennis, Ontario Science Centre, Flemingdon Park, Thorncliffe Park, Pape Village, Greektown, 2 transfers to Bloor-Danforth line @ Pape & Dundas West, Gerrard Sq, Riverdale, Regent Park, East Bayfront, West Don Lands, Distillery District, St Lawrence, King East, Union Station, Financial District (that alone is a HUGE argument in favour of the DRL), ACC, Skydome/CN Tower, Harbourfront, Cityplace, Fort York, Fort York neighbourhood, Exhibition, King West/Entertainment District, Queen West, Parkdale, Roncesvalles Village, 4 GO connections @ Etobicoke North, Weston, Bloor, & Union, the Junction, St. Clair, Mt Dennis, Weston, Woodbine Racetrack, 409/427 industrial area, Pearson.
Not to mention diverted ridership from the Yonge and Bloor subways, the King, Carlton, Dundas, Queen, and St. Clair streetcars, and the Eglinton LRT.
All that and the DRL is 5 km shorter than your proposed Eglinton line.