Swift Eaglet
I have not had either of the two Swift Porros you make reference to. However I bought a Swift 7x36 CFT Eaglet about a month ago. I always have some doubts whenever I see something that says that the light transmission is 99.8%, as claimed by Swift for the new Eaglet. I make a living evaluating human engineered systems, and that is just a little too close to perfect for me to take at face value. Having said that this is a very bright glass, much brighter than you will expect for the $450 (Eagle Optics price) you will pay for the binocular. I bought a Vortex Viper 8x42 when I got the Eaglet. I figured I'd let the optics tell me which was best. I was unable to tell a difference. Kept the Eaglet for its nice compact size and returned the 8x Viper for a 10x42 Viper.
While I had them, I was able to find Pentax SP, Kahles, Minox BR, HG, Ziess Conquest, and a Nikon LXL 8x32 at a couple of dealers. Both the Eaglet and Viper were so very close optically to the others, that I would be hard pressed to tell the difference. Certainly I would need to get the glasses out in the field and give them a serious side by side workout. The difference is that the Pentaz, Minox HG and Kahles are more expensive. This pretty much solidifies my opinion that the Swift Eaglet and Vortex Viper are quite probably the best buy for price vs quality.
I was looking to upgrade my Nikon Monarch 8x42, both Eaglet and Viper do that, being both noticeably brighter and sharper to my eye. The Eaglet is also superior in both brightness ans sharpness to my Baush & Lomb 7x26 compact, which is a really fine binocular. I really don't think the world would have noticed if Swift and Vortex would have priced these binoculars $200 higher than they are.
The Eaglet, does however have a couple of potential structural problems. The eye cups are twist up, either in or out, nothing in between. They really need to lock better in the out position, for mine at least, are a little on the weak side. However for me, the all the way out is just right, and using sunglasses or my reading glasses, all the way in works just fine. Also the movement of the center hinge is also looser than I would like. Similarly, the center focus also moves with far too little pressure intentionally applied to the focus wheel, which by the way moves through one revolution.
Some people seem to feel that the 374' FOV is too small. I am a center field binocular user, ant I think the FOV is just right, however that is a strictly personal choice. It is what it is and you will like what you like. Right now, the Swift Eaglet is the one glass I would keep if I had to have only one. There is a definite improvement over the Monarch, and to my eyes, the next "improvement" comes at the Nikon LXL level, or +2x the price of the Swift (or Viper).