to put it another way.
Doesn't matter who it is, or where they mine BTC to.
If you only have a Bitaxe 601 and are trying to hit a BTC block; you have a ~0.007% chance of hitting a block in one year. Anything more or less is just a lucky nonce. Nothing more, nothing less.
Shares on a solo pool are just a measure of if your miner is still reporting things to the pool... they dont count for anything other than a heartbeat.
If you are doing merged mining (merged pool share mining, not solo); your shares count for your share of the winnings; but thats in relation to the difficulty of shares being given. If your machine is reporting shares at 1,000+ difficulty; they will be worth less of a cut than the other person's shares being reported at 100,000+ difficulty. in fact, 100 times less.
See how it works?
BTW; congrats to the recent pool winner. I noticed my miner's high diff result reset the day the block was found. Since I finally bought a house and could afford to; I finally got and plugged in a lottery machine after all these years of absence. I moved away from my old spot where I had free power (back when the S7 was brand new, I ran one in my RV for many years all for free). But hey, power in Wisconsin is not anything compared to the cost of Cali where I was originally at.
You think your electric costs are high. Try living in the UK. $0.33 per KW/h