Science

Hi,
It doesn't make sense to have two Bachelor degrees one after the other as you'll waste a lot of time. Choosing between a B.Sc and B.Tech, you need to find out what do you like to do:
B.Tech is on a high rise now, and will be and whereas B.Sc does not match up to the number students pursuing B.Tech, but that is not a point to worry about. It actually depends upon you, how you are as a student. If you can remember things well, in case of studies, love to read and study and attain a full knowledge on your subject, then it is B.Sc to opt for.
If you want to be an engineer and work as a professional, who rolls back his sleeves for some tough work, then go for B.Tech.
Coming to career options, if you are pursuing B.Sc, you should aim for the highest level of degree possible in your field, which might take some years, but you will get a highly paid job. But, if you take up B.Tech and perform very well in each semester like around 80%, you are sure to land a very good job, although depends on the college you are going to study.