The sizes are close. The colors are similar, but the technique is different. The eBay fish appears to have the colors blended into the glass, as is common for Nason, while yours appears to have a distinct sommerso cavity with the colors on the outside of the cavity. The angel fish form was made by several companies, so I wouldn't feel comfortable calling it Nason without finding another that had the cavity like yours.
The animals of so many companies, Murano and elsewhere, were made using similar designs. The really tough ones used similar designs and techniques, so are so hard to attribute after the label is removed. The most I could say for your fish without finding one with the same technique is to say probably Murano, maybe V. Nason. There are a lot of V. Nason angel fish out there, so you might be able to locate a labeled one made using the same technique.