They both appear not have watermarks, so it has to be one or the other type 2 or type 3, 491 or 492. I just checked the PF Foundation past certifications. They are difficult to tell the difference.
It is too bad a better scanner or better software is not available. I don't even know how some of the low detail scans seen on this board could have been created unless a small scan is enlarged. Scans like this are frequently seen on eBay
providing yet another reason to avoid some sellers.
The scan notwithstanding, it is unlikely that either stamp is a 491. Many can be eliminated because the shade is too bright or because the paper is wrong. Because the watermark may be so hard to see, the stamp should be examined using a Visual Spectral Comparator (VSC) for signs of a watermark. When watermarking at home, if a watermark is not visible in lighter fluid, use Clarity in a glass watermark tray. Another technique is to backlight the stamp with a strong light in a dark room.
In my experience 99% of 491 candidates are 454. I found one in a donated collection to a stamp club in Portland, OR and had it certified on their behalf. Because the printing quantity was so low, don't expect to find one on the first or even the tenth try.
Because the type cannot be fully established in the obfuscated scans provided, in addition to the missing line in the left and right ribbons, check and understand the engraving differences between types I, II and III below Washington's ear lobe and be aware of the many other differences in the mouth, chin and surrounding design elements. Many type III stamps are poorly printed and may at first glance appear to be type I or II, which are seldom poorly printed. Finally, check the ribbons closely with a 10 or 15 power magnifying glass in oblique light for signs of scraping or other design alteration intended to make a type III appear to be type II.
Also, consider investing in a high quality dedicated flatbed scanner from Canon or Epson instead of one of the many included as an afterthought with an inexpensive printer. Some of the more expensive multifunction printer scanners will scan at 1200 DPI, but a single function scanner with much higher hardware resolution will cost less. It may be necessary to use VueScan to take full advantage of an existing or new scanner. Most scanner vendor software is brain dead or worse. Also, buying a copy of Photoshop Elements would be well worth the price if a copy is not bundled with a new scanner. Freeware also exists, but you are on your own.