Widzę różnicę w cenie.

Polish often drops subject pronouns when they are not needed. The verb form widzę already tells you the subject is I.

• widzę = I see
• widzisz = you see
• widzi = he/she/it sees

So Ja widzę różnicę w cenie is possible, but it would usually sound more emphatic, like I see the difference.

Widzieć is the infinitive, meaning to see. In a full sentence, you normally need a conjugated form.

Here, widzę is the 1st person singular present tense form:

• widzieć = to see
• widzę = I see

So the sentence uses the form that matches the subject understood from the verb: I.

Because różnica is the direct object of the verb widzę, it has to be in the accusative case.

Różnica is a feminine noun, and many feminine nouns ending in -a change like this in the singular:

• nominative: różnica
• accusative: różnicę

So:

• różnica = difference, as a basic dictionary form
• widzę różnicę = I see a difference

After the preposition w, Polish often uses the locative case when it means in, within, or in the area of something.

The noun cena changes in the locative singular:

• nominative: cena
• locative: cenie

So:

• w cenie = in the price

This is why w cena is not correct here.

Because w can take different cases depending on meaning.

• w + locative usually means being in something, or talking about something conceptually
• w + accusative usually suggests movement into something

Here there is no movement. The phrase means something like in the price / price-wise, so Polish uses locative:

• w cenie

If it were about motion, then accusative might appear, but not in this sentence.

It is an idiomatic way to say in the price or price-wise.

So the sentence means that the speaker notices a difference as far as the price is concerned. It does not mean being physically inside a price; it is an abstract use.

You will often see similar patterns in Polish:

• różnica w jakości = difference in quality
• różnica w wielkości = difference in size
• różnica w cenie = difference in price

It can be understood a bit more broadly than literal eyesight. In this sentence, widzę różnicę often means:

• I can see the difference
• I notice the difference
• I can tell there is a difference

So it may be literal, but it can also be figurative, especially when talking about something abstract like price.

Yes. Polish word order is fairly flexible, because the endings show the grammatical roles.

Widzę różnicę w cenie is a neutral, natural order.

Other orders are possible, for example:

• Różnicę widzę w cenie — puts more emphasis on difference
• W cenie widzę różnicę — puts more emphasis on in the price

Even though the core meaning stays similar, the emphasis changes. For a learner, the original order is the safest and most neutral.

A useful approximate pronunciation is:

• widzę ≈ VEE-dzeh
• różnicę ≈ roozh-NEE-tseh
• cenie ≈ TSE-nye

A few helpful notes:

• w sounds like English v
• rz and ż usually sound like the s in measure
• c sounds like ts
• ni before a vowel often sounds like ny
• final ę is often pronounced more simply than a fully nasal vowel in everyday speech, often close to e or eh with some nasal quality depending on the context

Yes, widzieć is an imperfective verb. That matters because Polish aspect affects how verbs behave.

Here, the sentence is in the present tense, and widzieć naturally works in the present:

• widzę = I see / I can see

A perfective verb normally would not be used this way for a simple present meaning. So this sentence is completely normal with the imperfective widzieć.

Yes, but the meaning changes a little.

• w cenie = in the price, usually referring to one price, one offer, or one item
• w cenach = in prices, more general or involving multiple prices

So:

• Widzę różnicę w cenie = I see a difference in the price
• Widzę różnicę w cenach = I see a difference in the prices

Both are correct, but they refer to slightly different situations.