I'm no expert on Baby Lock machines. I looked at the Sofia2 and it looks like it would be a good introductory sewing and embroidery machine (and piecing machine), good for taking to classes because of its light weight, but not so good for machine quilting because of its small harp. I guess I would hesitate to purchase this machine for quilting. Are you sure you want to get into embroidery? Most people who start out with an introductory embroidery machine quickly find the small design size limiting and want to upgrade to a separate embroidery machine that can handle larger designs.
Taking just a cursory look at the Ellure Plus, again it is a combined sewing and embroidery machine. If you are serious about embroidery, it is often a good idea to purchase one machine for sewing/quilting and a separate machine for embroidery. This way, while the machine is sewing out a design, you can be piecing or quilting on the other machine. It looks to me as if the harp size is larger on this machine, but not as large as say a Janome 6500P (which I think is in the same price range).
Are you absolutely sure you want Baby Lock? Usually when shopping for a new machine you determine your price range first and then list the features you want -- things such as needle down, presser foot lifter, decorative stitches, etc. and then try out machines with those specs in several different brands. It seems to me the two machines you listed are in such radically different price ranges there really is not a good way to compare them. You might want to do more research before basing a purchase decision simply on a sale. There are ways to get good sale prices on machines at many times throughout the year.