I think this is a good attribution, as shape to some degree can be affected by individual glassblowers, while sticking to the main principles for the pattern, these two and the one from the my book (written with Jindrich Parik, Ed. Mark Hill) are all shaped slightly differently, while the basic attributes are constant, the curving indentation along the body, the pulled lip, are the same. As John says, some Skrdlovice patterns are more difficult to identify than others! I have a couple of fifties Skrdlovice, that still make me scratch my head a bit... In the world of glass, noone knows it all....
Robert (bOBA)