It's a matter of personal preference/experiences. You can do a side by side though if you want.
If you've got pictures of your seedlings through the first 2 weeks of their growth you can compare them now to mine a few pages ago. Have a look at them and tell me if you're seeing better results by using a 1000w. It's a simple comparison you can make for yourself. I genuinely am curious to see if you can convince me the 1000w does it better than the 125.
Like you say, each to their own with regards to the methods you use, but I still maintain that until the plant is about 6" tall and has a few fan leaves to process the light, you don't get much if any benefit using a 1000w instead of a 125w.