I’m don’t know which one has more flood, I could do a comparison later but I believe they are pretty close in the flood department.
No they aren’t “front pants pocket” EDC style lights. I realize that’s not what you were asking about here (your primary uses would be for a “night stand light and to check my yard”) However the X6 is a good bit more compact than a C8, it will fit in your pants pocket for the purpose of going out to check the yard etc. and it has a nice pocket clip for that purpose. I think it’s a lot smaller in person than what it appears in the photos. The c8 does not have a pocket clip.
For the few dollars more you’ll pay over a C8, the X6 is more compact, more solidly constructed, has better heat management, and a nicer style overall. I believe you will find it has decent flood for your intended use.
C8 / X6 Size comparison (length x head diameter):
C8: 145mmx44.5mm
X6: 135mm x 40mm
Here’s a comparison photo (courtesy of unknown00101’s 2014 X6 review)
Left to Right: Sk68 - Convoy S2+ - Eagle Eye X6 - Solarforce L2 - Convoy C8

(Click the photo to go to the review, which has some beamshot comparison between the X6 and a Convoy C8)
The newer version X6 with XPL HI that I linked in my previous post will be brighter with more throw than the one in the review. (rated 1200 lumens vs 860 lumens)
There is also an X6 Neutral tint version available but it’s not the brighter XML HI.
The X6 XPL HI can also be bought at this Aliexpress store: Eagle Eye X6 CREE XP-L HI V21A 1200LM 4Modes LED Flashlight 18650
There is a thread here on BLF about it from the store owner: EAGLE EYE X6 XPL HI V21A 1200lunens LED flashlight Free shipping $22.13 (now $21.59)
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The XPL HI emitter ( HI= High Intensity) is a fairly recent advancement in LED design that is drawing lots of attention in the flashlight world. It’s becoming more available in production flashlights and is probably going to be the emitter of choice that will be used in the upcoming custom BLF X6 Special Edition Version 2 flashlights. BLF X6-SE v2 & X5 Group Buy
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Neither the X6 or the C8 are available in a 2-cell version. For a 2 cell light the Convoy L4 that zak.wilson recommended is a great option, its like a high quality C8 with side switch for mode changes (along with the rear switch for on/off) and the option to use either one or two batteries, seems to me like a lot more bang for your buck for around $10 more than a C8. It also can be ordered in the T6-3B neutral tint as well as other tints. Here’s some links for it:
Convoy L4 Simon Aliexpress
Convoy L4 at Banggood
Convoy L4 at GearBest
Convoy L4 Review
Here’s another one to consider for a 2 cell light, it has the batteries loaded side by side so it’s much shorter and compact to carry in your rear pants pocket or coat pocket. Its really bright with excellent throw and decent spill. It has been very popular with members here on BLF:
Small Sun ZY - T08 1000 Lumem LED Flashlight