It kinda is as simple as that.
[TABLE=width: 360]
[TR]
[TD][TABLE=width: 424]
[TR]
[TD]Asset[/TD]
[TD]Year 1 Value[/TD]
[TD]Year 2[/TD]
[TD]Year 3[/TD]
[TD]Year 4[/TD]
[TD=align: right] Total[/TD]
[/TR]
[TR]
[TD]WAR Value[/TD]
[TD=align: right]8.20[/TD]
[TD=align: right]8.94[/TD]
[TD=align: right]9.74[/TD]
[TD=align: right]10.62[/TD]
[TD=align: right] N/A[/TD]
[/TR]
[TR]
[TD]Donaldson[/TD]
[TD=align: right]45.92[/TD]
[TD=align: right]45.58[/TD]
[TD=align: right]44.82[/TD]
[TD=align: right]43.54[/TD]
[TD=align: right] 179.86[/TD]
[/TR]
[TR]
[TD]Strasburg[/TD]
[TD=align: right]31.16[/TD]
[TD=align: right]38.43[/TD]
[TD=align: right]0.00[/TD]
[TD=align: right]0.00[/TD]
[TD=align: right]69.59
[/TD]
[/TR]
[/TABLE]
[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[/TABLE]
With a 0.5/year change (up for Stras, down for JD), yeah, Donaldson pretty much is. Donaldson is far better than Stras right now and has 2 extra years of likely equal production.
For those graphically inclined:
http://i.imgur.com/7I0ZRlx.png
Reader's digest: (Great player x 4 years) ~= (Good player * 2 years) x 2