What makes the 4010 better? A couple of reasons:
1. Only dual charger that can do high amperage on
both channels (assuming you get a powerful enough power supply)
2. Updates. The charger is continuously refined/updated. Check RCgroups.com forum for the latest.
3. Batteries are not going down in overall Mah. You won't have to keep buying chargers as batteries expand to 10,000mah+ (someday, hopefully (?) in the future)
4. Running more than one class is much easier to do with two channels.
I don't even know why you attempted such high charging rates, a 2-3c charge rates are sufficient for most racing. Others may disagree, but that's been my experience. You might as well run mod if you're looking for that extra punch.
I'm not sure how long you have been in RC, but I look at the 4010/PL8 as being like the old Competition Electronics Turbo 35 series chargers. You certainly don't need the power, but isn't it nice to have when you need it? Kind of like having a 4wd truck, you may not need 4wd all the time, but the one time your on the trail and you need it....
For those reasons, I think your doing yourself a disservice by buying a less powerful charger. That's IMHO, nothing more.
But do what you want man, it's a free country.
FWIW, If you ever want to discharge any Lipo, just buy the RMS Dumper. I have been testing it over the last few months, and it is very good for what it does. I hope to have a review on it in the near future.