OWLSHD

I am looking at 2 different Singers and can't seem to find the difference between the 47W66 and 153K103 on the internet. does anyone have experience or knowledge with them? I am looking for a cylinder arm, medium - to heavy material sewing machine, and have zeroed in on these 2 as not being too expensive. Thank you.

Thank you to all that have replied. It is very expensive trying products that may or may not work, so I appreciate hearing of success through long term use.

Does anyone have a recommendation for contact cement to replace Barge which does not seem to be as strong a product as it was a few years ago? Thank you.