My p2pool performance versus publicly hosted large MPOS external site

I have been trying to size up my environment that I built out another pool just to try to size up if mine is performing as it should be. Here are the results of mining the same coin.

I have 2 sets of mining hardware, one at work (~6.50mhs), the other at home (~1.95mhs). I also switched them vice versa as a comparison. The p2pool is running in a VM at work. (Don't ask how or why about work...)

The MPOS pool is a public pool that I have about a ~35.0 ms latency at stratum-us.xxxxxxxxxxxxxx.com. I am not trying to bash the other site or pool, so I am leaving their name out. But I will say that they are a huge player. So naturally, I'm a bit surprised.

Not bad latency, from home to work I get about ~25.0 ms. The dyn diff on my pool is about 32. The diff of shares on mpos pool, cgminer shows at 512. So my p2pool is more chatty and network latency would come into play more if both share difficulty were the same, but my pool is sending 10x more the shares and accepted messages than the mpos pool. It could be the load on the public site playing a big factor when I have next to none? Although I am in a VM and it is drawing less than 120MB RAM. CPU is also flat at less than 10%.

3/10 to 3/12
Pool Type    Hashrate    Coins    Coins/Mhs    Timeframe
P2Pool    1.95    19,553.15    10,027.25    48 hours
MPOS    6.50    45,008.11    6,924.32      48 hours

P2pool won again by 30%

Here are the previous results:
3/7 to 3/9
Pool Type    Hashrate    Coins    Coins/Mhs    Timeframe
MPOS    1.95    19772.289    10139.63    72 hours
P2Pool    6.832    105237.535    15403.62    72 hours

3/6 to 3/7
Pool Type    Hashrate    Coins    Coins/Mhs    Timeframe
MPOS    1.95    5988    3070.76    20 hours
P2Pool    6.832    25376    3714.28    20 hours

Anyone seeing similar results or opposing results? Any other benchmarking of pools?