Memory Leak BETTER with GSM??

Had an interesting experience. Was traveling in Europe with my 9530 and found that my daily memory leak was less when using GSM than when I am using Verizon CDMA in the US. This was true both when using a local (Orange) SIM card and using the provided Verizon/Vodafone SIM with data usage using Verizon's GlobalEmail plan. No other change in programs. Obviously with the Orange SIM, I wasn't using data, but I was using data with the Verizon/Vodafone SIM at about my usual rate (emails & some GoogleMaps).

Anyone else have any similar experiences or any idea why this may be so?