We don't tend to splurge on Deluxe hotels during peak holiday weeks, but CR is walking distance to MK. If you can make good use of that, then Cr is a great place to stay. At the end of the night, you do not have to wait for bus when leaving MK. Easter week, that can be a real timesaver.
Also, you are currently booking at rack rates, but Disney may well release a discount that you can apply. Not always for peak weeks, but sometimes. That might bring the difference closer.
If Disney has the extra PM hours, and your stay happens to give you access to 2 of those nights, then you might think of the difference as paying $320 per person for that perk.
I think the Garden wing is a nice place to stay. A plus of CR is easy access to all monorail dining. Easte week it is great fun to see the Easter eggs in the lobbies of CR and GF. Another important difference between CR and POR is that POR is sprawling. If you like walking around POR, you might miss it. If you would prefer to waist less time walking back and forth, you'll like CR.
The ultimate answer to your question is not so much if we think it is worthwhile, but if it is worthwhile to you. If you can take advantage of the perks of CR, then yes, it may well be worth $1660 more. If you do not plan to make use of the CR perks, then those extra PM hours won't matter. CR rooms are a bit larger than POR, but not a dealbreaker difference. You also get the dining of CR and monorails, but not the POR food court.