No that card is slower than the HD2400, but the difference is minimal because they are both so hampered by the slow/thin PCI bus.
It almost doesn't matter what you get because it would be like buying a V6 or V8 and then taping the air intake so that there's only a pin-hole left. Sure one or the other is more powerful at the core, but since they are so far from optimal output they're not going to be all that great or even noticeable in their differences. Only the on board workload, like increased AA might benifit one or the other, but really it won't matter much there either since they are both weak in AA due to the small bitwidth VRAM.
IMO your
best bet is if you can find an inexpensive MOBO that supports your CPU & RAM that you already have for around ~$50-60, and then add something like this (if you must go TD);
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4035118&CatId=1558
or from NEgg one of the following;
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121243
http://www.newegg.com/Product/Product.aspx?Item=N82E16814145161
Even if the Mobo were just over $60 you could always go with these, which while not great, would perform better than any PCI card you're looking at;
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121259
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121230
All would be much better IMO, and also give you an upgrade path after this one, although you're still going to be on the low side of the settings.
Best bet for getting some medium settings is a GF9500 or HD3650/4650 class of card with 128bit memory (size doesn't matter much but 256MB is the norm nowadays).
That would be my recommendation, because PCI just is going to be very unsatisfying, and leaves you no future.
Also if you can swing about $60-65 towards a graphics card after the mobo replacement, then you're looking at things that would be better at Medium on a game like Crysis, like a GF9600GS/GSO/GT or HD4650/4670.