Maybe are the same, I know I will cause some controversy here but I bet the spokes u have right now are 297's and 295's or around 201s, 1 extra mm wont do anything to the built.
Loose the old wheel, and move one spoke at a time and put it back in the same position in the hub and in the rim, in this way u wont have to deal with crossing, figuring out stuff and the building will be faster also. I would go to the store to get a few new spokes just in case and replace all the nipples. When u more rims is easier tho.
Good luck.