You now know that the iPhone 6S is worth the upgrade if it tickles you pink. More so, if you're into 3D touch and a faster processor, among other features.

But what if you're vain (like me) and all you care for is the camera? Apple says it's now upgraded to 4K video and 12 megapixels. The Cupertino-based brand tells Mashable that the new iPhone 6S is far superior at photographing than its older sister, but how true is that? Is the camera worth the sticker shock to shell out for the new phone?

To test the new device's camera, we enlisted the help of photographer and professional iPhone fashion snapper, Kevin Lu. The New York-based content creator shot exclusive first looks on the iPhone 6S for Vogue.com during New York Fashion Week and claims the camera is better than ever.

"The most obvious difference between the 6S and 6 is resolution," he tells Mashable. "With 12 megapixels instead of 8, the iPhone 6S is able to capture more details and retain more data. What this means for most people is that we are able to zoom in a lot more when we need to, while still maintain a level of sharpness."

Lu also says the new device is smoother and more responsive, while performing a tad bit better in low-light scenarios.

But before judging with a naked eye from these pics, Lu says you need to enlarge it to see the real difference.

"When these photos are enlarged for bigger viewing areas, like a large computer screen or TV, the difference is quite dramatic," he says.

To get the best shots, Lu photographed three models at One Management throughout New York City in three very different times of day.

We pitted two similar photographs taken on both phones to see if there really was a difference. While we couldn't differentiate between some, others were strikingly better. See below for yourself.

Morning photos in Central Park

Lu photographed model Lindsey Kevitch at Central Park in broad daylight with the sun saturating the photographs.

Afternoon photos at Greenwich Village

With Nina Marie Daniele, Lu went around New York University and Washington Square Park for these silly photos with the model.

Night photos at Times Square

The trickiest photographs are usually taken at night. Lu shot Brittani Bader in Times Square with the bright lights shining on them.

To get the most out of your iPhone's camera, Lu gave us five tips to instantly upgrade your photographs.

1. Focus is your BFF

Tap and hold on where you want to focus your picture (for example, face) then slide your finger up and down the screen to set exposure.

2. The bright lights

When in low-light places, hold your phone as close to your body as you can, or brace it on a solid surface to avoid hand shake that leads to blurry photos. Also try holding your breath when you're about to snap a pic.

3. Saturation is a killer

In a high-contrast lighting scene (think outdoor photos on a sunny day), turn on the HDR mode to retain details in the brightest areas.

4. Ready, set, go!

Use burst mode by holding the shutter button a little before a fast action scene, until a little after. This way you will be able to choose your favorite photo later.

5. Shine on (your face)

Turn on the flash when taking a selfie, to ensure the face is lit.