At 1236z I moved to the 10m WSPR beacon (500mW 100% TX) and 6m WSPR (1W ERP 20%, 80% RX, V2000 vertical antenna) simultaneously. It will be interesting to see if there is Es in evidence on 6m too. With 6dB less power on 10m, I expect to get spotted less often.
UPDATE 1325z: EA1FAQ (1249km) has spotted my 500mW 10m WSPR 2 times so far. Still quite decent reports too.
UPDATE 1445z: EA1FAQ is now spotting my 500mW 10m WSPR at -12dB S/N, implying that a few milliwatts would have been quite enough. My reports from him are getting better. No spots yet on 6m WSPR.